Roller-mill



2 Sheets-Sheet 1.

(No Model.)

J. M. SOHUTZ.

ROLLER MILL.

Patented May 24, 1887.

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N. PETERS, Phuhrhflwgrapher, Walhlngton. n.c.

(No Model.) I 2 Sheets-Sheet 2. J. M. SOHUTZ.

ROLLER MILL.

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UNITED STATES PATENT OFFICEC JOSEPH MARTIN SOHUTZ, OF MINNEAPOLIS, MINNESOTA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 363,687, dated May 24-, 1887.

Applicaiion filed December 11, 1895. Renrwed January 2 1887. Seiial No. 225,784. (No model.)

To all whom it may concern.-

Be itknown that I, J osnrn MARTIN SoI-IUTZ, a citizen of the United States, and a resident of Minneapolis, in the county of Hcnnepin and State of Minnesota, have invented certain new and useful Improvements in Roller'Mills, of which the following is a specification.

Figure 1 is a sectional side elevation on line 00 .r of Fig. 2. Fig. 2 is a sectional front elevation on the line 9 y of Fig. 1; Fig. 3, a side elevation of the machine on the adjustment side. Fig. 4 represents detached views, in perspective, illustrating the construction of the supports for the lower chute and the conveyer-trough. Fig. 5 represents one of the adjustment-levers detached. Fig. 6 repre sents one of the cams detached and in perspective, whereby the alignment of the rolls is preserved. Fig. 7 represents the adjustmentlever cam mechanism, detached and in per sp'ective, whereby the distance between the rolls is regulated.

A A are the side frames, between which the rolls are journaled, connected together by the tie bcams or bolts a in the ordinary manner.

B B B are th ree grinding-rolls, placed in line perpendicularly between the sides A A, and

with their journals b b b" passing out through the said sides, as shown. The center roll is held in a fixed relation to the frame A A by being journaled in bearings c c on the frame, while the upper and lower rolls are made adjustable with relation to the center roll by means of levers D D, in which their journals Z) Z) are arranged to be held by caps d d", as shown in Figs. 3 and 5.

Projecting outward from the side frames,

A A a short distance above and below and to one side of the points where'the journals 1) b pass through the side frames, are lugs c 0', through which bolts 0 c are passed from the inside outward, each bolt having a square head, a", fitting into corresponding cavities in the side frames, so that the bolts can neither be revolved nor pulled outward. Fitted loosely upon these bolts 0 0 outside the lugs c c, are small hexagonal or square collars c, and to the inner sides of these collars are formed small circular disks c which fit into corresponding circular cavities in the short ends of the levers D D The holes through the disks 0 and collars a,

in which the bolts 0 a fit, are otfto one side of the center ashort distance to form the disks into eccentrics, so that by revolving them in the levers the latter may be adjusted to the run perfectly true and in line with the center roll;

Holding-nuts a will be placed on the outer ends of the bolts 0 c to clamp the collars c and eccentrics 0 fast to the lugs 0" c, and thus hold the eccentrics fixed in the lovers D D", and hold the latter firmly whenever desired.

Each end of each of the rolls B B will be provided with a set of these levers and their adjusting mechanism.

The opposite or long ends of the levers D D are held by rods E E, the lower ends of the former and the upper ends of the latter being secured to the central parts of the side frames, A A", by cams e a fitting over the ends of a shaft, 6", passing through both the side frames, A A. Beneath the levers D and above the levers D the rods EE are provided with jam-nuts g g", by which the levers may be adjusted with relation to the rods. Above the levers D and beneath the levers D coiled springs F F are arranged around the rods E E", and held in place and adjusted by nuts g g, as shown. By this arrangment the long ends of the levers are supported in the direction of their greatest strains by the springs F F, which are strong enough to resist the pressure of the ordinary material which passes between the rolls, but will be compressed and allow the rolls to be spread apart in event of any foreign hard matter gettingin between the rolls, and thereby prevent injury to the rolls.

The eccentrics or cams c c" are fast upon the shaft 6 and thelatter is provided with a handlever, e, by which it may be oscillated. This lever is provided with a slotted segment, 6, by which the lever may be clamped in any position by a thumb-screw, e, connected to the frame A. By this means the eccentrics e 0" may both be turned at once by the lever 12 and raise and lower the long arms of the levers D D and thus set the rolls B B nearer to or farther away from each other.

After the rolls have been once adjusted by the jam-nuts g 9 the rolls may be adjusted very quickly for coarse or fine grinding by simply moving the lever c to somedesignated mark on the segment 6 so that as long as the adjustment by the nuts 9 remains true the change of the grade of the rolls may be accomplished entirely by the lever e. By these two a(ljustmentsviz., laterally by the eccentrics c and verticall bv the nuts and cams c e'"-I am enabled to very quickly and easily adjust the rolls to run perfectly true both latorally and vertically.

G is a feed-hopper, into which the material to be fed through the rolls is placed. The

bottom of this feed hopperis formed of a plate,

by a belt, h", leading from a pulley, 75, on the shaft 1) of the lower roller, B upward over a pulley, h, on the shaft h and thus cause itto vibrate the plate G and cause the material to be fed off over its edges in thin even streams to the rollers belowa G G represent feed-doors adapted to be ad justcd higher and lowerby screws G G to open and close the spaces between the hopper G and the edges of the vibrating plat-c G", to regulate the feed.

H is a chute fixed across between the sides A, A and adapted to guide the mate rial. From one side of the hopper G, between the rolls B B and H, is a similar chute, arranged to guide the material which falls from the other side of the hopper between the rolls B B, as-

. ings 7e 7c in the sides A A", opposite the center roll, B, and running in a trough, as shown. The side of this trough 70* next the roll B is bent off at an angle and adapted to rest against the roll, and thus serve asascraper to cause the material passing between the rolls B B to all run intothe conveyer.

The conveyer K is formed right and left handed, so that the material will be equally divided and carried off to each side.

The ends of the trough 70* rest upon ribs on angularshaped plates M M the latter embedded into the wooden linings L L of the side A A One of these plates, M is shown in perspective in Fig. 4. The lower edges of the plates M M" are inclined to correspond to the chute H and are provided with ribs 6, on which the chute is supported. Behind these plates M M the linings L L. are pierced with slots or cavities, and opposite these cavities the side frames, A A, are formed with hoods M M", forming pockets M M. The ends of the conveyer K open into the upper ends of these pockets, and the lower ends of the pockets open into the interior of the machine beneath the plates M M The material from the conveyer K is thus carried around the chute H while the material passing over the latter runs beneath the trough kand between the rollers B B. By this means two separate grindings are obtained with only three rolls, B B B.

Small doors M M are formed in the hoods M M, opening outward in theline of the path of the'ground'material, to form a means of escape for the material from the conveyer K should it become clogged in the pockets. This is a very important feature of my invention, as, withoutsomesuch device, any clogging that mi ghtoccur would cause the material to back up between the rolls B B or become packed by which they are held in place on the ribs i,

as shown in Figs. 1 and 4.

H is a third chute, resting by its lower edge on the upper outer edge of the trough k of the conveyer K and projecting upward beneath the vibrating feed-plate G", to prevent the material falling from the feed-plate passing into the conveyor, but guiding it all upon the chute H. The conveyor is shown as driven by gears K K from the shaft b of the center roll,

N is an idler-pulley resting against the belt h and journaled on one end of ahanger, N the other end of the latter being pivoted to the pin or bolt 0 of the adjusting-lever D", or tosome other fixed part of the frame, and connected near its upper end by a rod, N, to the segment 6 of the lever e", as shown. Thebelt h is loose-enough so that when the idler N is removed from contact with it the belt will not act upon the pulley h,- hence when the lever c is turned to throw the rolls B B B out of operation the same action, by means of the rod N connecting the lever -6 and idler-hanger N will remove the idler from contact with the belt h, and thus at oncestop the motion of the feed-plate G,'so that the feeding of material will cease at the same time that the rolls are thrown out of operation. By this means no waste of material occurs, as the feed-plate is so flat that the material will not flow over it unless it is vibrated.

It may be found necessary or advantageous under some circumstances to move the upper and lower rollers, B B laterally, instead of perpendicularly, which may be done by the IIO tion of the mechanism to prevent this.

Having thus described my invention, what I claim as new is 1. In a roller-mill, a center roll, B mounted in fixed bearings, fixed bolts 0%, circular disks 0 c, eccentrically mounted on said bolts, and levers D D above and below said center roll, having circular cavities or apertures which fit over said disks, in combination with rolls B B mounted on said levers above and below said center roll and in the same vertical line therewith, and mechanism which simultaneously moves the free ends of said upper and lower levers in opposite directions, substantially as set forth.

2. I11 a roller-mill, a center roll, B, mounted in fixed bearings, fixed bolts 0 c, circular disks 0 c eccentrically mounted on said bolts, nuts 0 c, by whichsaid disks are clamped, and levers D D above and below said center roll, having circular cavities or apertures which fit over said disks, in combination with rolls B 13, mounted 011 said levers above and below said center roll, and in the same vertical plane therewith, and mechanism which simultaneously moves the free ends of said le vers in opposite directions, substantially as set forth.

3. In a roller-mill, a center roll, B, mounted in fixed bearings, fixed bolts'c a, fixed lugs orsleeves c c, in which said bolts are held, circular disks 0 c eccentrically mounted on said bolts, collars e 0, formed on said disks,

and nuts 0 c on said bolts, which clamp said collars against said lugs, whereby said disks are held in position, in combination with 1evers D D, above and below said center roll, having circular cavities or apertures which fit over said eccentric disks, rolls B B mounted on said levers above and below'said center roll, and mechanism which simultaneously moves the free ends of said levers in opposite directions, substantially as set forth.

cams 0 there being nothing in the construc- 4. In a roller-mill, side frames, three rolls, one above the other, chutes which convey material to be ground to said rolls, a trough losaid trough, which conveys the ground material in opposite directions,in combination with projecting hoods M Mon said side frames, opposite the ends of said conveyer, and reliefdoors M M in said hoods, which open in the line of the path of the ground material, substantially as set forth.

5. In a roller-mill, side frames and three rolls, one above the other, mounted therein, in combination with chutes H H", right and left conveyer K, trough It, hoods M M* on the side frames, opposite the ends of said conveyer, angular plates M M supporting said chute H and trough in, and cams m, for Se curing said chutes, substantially as set forth.

6. A roller mill comprising side frames, A A fixed roll 13", and adjustable rolls B B pivoted levers D D, supporting said adjustable rolls B B, rods E E, shaft 6, provided with eccentric collars e e and lever e, feedplate G, shaft h", having cams h, pulley h on said shaft, pulley I1. on the shaft 1) of said roller B belt h, running over said pulleys 'h h, pivoted hanger N, having idler-pulley N,

and rod N connecting said hanger with said lever 0*, whereby the movement which separates the rolls B B from the roll 13 also removes the idler from the belt h, and thusstops the motion of said feed-plate, substantially as set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOSEPH MARTIN SCHUTZ.

Witnesses:

G. N. WooDWARn, JOHN W. HEAD. 

